CVE-2022-25156Network attack vector

Unauthenticated login via recoverable password hashes

Published Apr 1, 2022 · Updated Aug 3, 2024

Weak password hashing in Mitsubishi Electric MELSEC iQ-F, iQ-R, Q, and L series all versions allows remote attackers to obtain login access. The password-authentication path hashes credentials weakly enough that captured hash material can be reversed to recover the accepted password. Remote attackers must first eavesdrop on authentication traffic; recovered credentials enable product login and information disclosure, but no integrity or availability impact is reported.

CVSS severity5.9
Medium
EPSS probability1.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Weak password hashing in Mitsubishi Electric MELSEC iQ-F, iQ-R, Q, and L series all versions allows remote attackers to obtain login access. The password-authentication path hashes credentials weakly enough that captured hash material can be reversed to recover the accepted password. Remote attackers must first eavesdrop on authentication traffic; recovered credentials enable product login and information disclosure, but no integrity or availability impact is reported.

The record

CVE
CVE-2022-25156
Published
Apr 1, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-326, CWE-328, T0859, T0842
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 1, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.9Mitsubishi Electric CorporationCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
8.1NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-326Inadequate Encryption Strength
CWE-328Use of Weak Hash
T0859Valid Accounts
T0842Network Sniffing

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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